From patchwork Tue Apr 20 19:37:40 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Kumar Kartikeya Dwivedi X-Patchwork-Id: 12215047 X-Patchwork-Delegate: bpf@iogearbox.net Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C025DC433ED for ; Tue, 20 Apr 2021 19:37:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8D20B613AE for ; Tue, 20 Apr 2021 19:37:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233785AbhDTTi1 (ORCPT ); Tue, 20 Apr 2021 15:38:27 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35454 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233787AbhDTTi1 (ORCPT ); Tue, 20 Apr 2021 15:38:27 -0400 Received: from mail-pg1-x542.google.com (mail-pg1-x542.google.com [IPv6:2607:f8b0:4864:20::542]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6B823C06138A; Tue, 20 Apr 2021 12:37:55 -0700 (PDT) Received: by mail-pg1-x542.google.com with SMTP id y32so27374032pga.11; Tue, 20 Apr 2021 12:37:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=ggSnWKXUJLE6iHcOs0eUWOJm8Vh5SmESAPT+YojILTs=; b=ZkUENDZH0Dfzhu3yQhk2ckxI79uQ/YN8MF/ZzdjvRJYty1qkQSl+5AWbCMoeIiPYzJ xa53ShKa4XGlecfYUHuXLEOXyDAead5kghszWVKO6DYH0wT0O7oSD3uudMwQhgpQ6t7x YZ2JRGwGjfw9p5iURmNzh+fUNF4XZNdRY6imEjYA+jYG40Nd1QbgjqarXa4MWjJkKGr2 73pbGVvacPqraYGSmn9S2n4oRPUzw0NQ+9WUEDLu2Oo+oSW6S7kAJ26GHkstKIbqu4ac dIaNWgM69ht4UuBWBJJQELSEvq5kMuadquT04dpQlTS4/JZI8bPeFAUFekW0v5ixeuXt y6NQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=ggSnWKXUJLE6iHcOs0eUWOJm8Vh5SmESAPT+YojILTs=; b=RX7+hQuvKF9rOosO102EX/Ium9nWNE8GbbWoxsVw5Sfu4joLUTyIAJbc0Ti2M7vN/O KuKrw02Wps4FRQLR6wCGBMZJgYcd3D19HqXJIJPSkCy8vVMQAxqoZpgHDFe/x+0f38Lr 9gyv4RR9CYrKudzcVLeP90aw7LgYmLhSCN9PO2irD+gSV97hmMz9tpJj/gpyA6FAh7KA TZLo0zn6pvOGZgDSiAI856B3ujUxOiZH0RzTK6d8h7nXJM3gBH8xb4OIoGoUzw5TSKpN 8plZhoFfFlJ31oTT+4MFN7ncNZra4U4Tb1oC8DHrjCref9Kq4hE+aRAMrY5bp0sOFtMk sOSQ== X-Gm-Message-State: AOAM532mBhRPGO44S0d0i1+7xNQgKtV4wCWABcXTmnqBqlEkKWNlO6kU 9WWud50tEFuuWlGgKcn+xiCfi7MFsEw8DA== X-Google-Smtp-Source: ABdhPJz1Vyx87oJ0VKjUuP7ZO7nPIrrWmgbTjs1OprdgRfIjMp9RwNjF1walaOY49VihKz2QUFy/sQ== X-Received: by 2002:a62:4d86:0:b029:252:c889:2dd8 with SMTP id a128-20020a624d860000b0290252c8892dd8mr27264030pfb.41.1618947474750; Tue, 20 Apr 2021 12:37:54 -0700 (PDT) Received: from localhost ([112.79.227.195]) by smtp.gmail.com with ESMTPSA id p22sm3063937pjg.39.2021.04.20.12.37.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 20 Apr 2021 12:37:54 -0700 (PDT) From: Kumar Kartikeya Dwivedi To: bpf@vger.kernel.org Cc: Kumar Kartikeya Dwivedi , =?utf-8?q?Toke_H=C3=B8iland-?= =?utf-8?q?J=C3=B8rgensen?= , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Martin KaFai Lau , Song Liu , Yonghong Song , John Fastabend , KP Singh , "David S. Miller" , Jakub Kicinski , Jesper Dangaard Brouer , netdev@vger.kernel.org Subject: [PATCH bpf-next v3 3/3] libbpf: add selftests for TC-BPF API Date: Wed, 21 Apr 2021 01:07:40 +0530 Message-Id: <20210420193740.124285-4-memxor@gmail.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210420193740.124285-1-memxor@gmail.com> References: <20210420193740.124285-1-memxor@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net This adds some basic tests for the low level bpf_tc_* API. Reviewed-by: Toke Høiland-Jørgensen Signed-off-by: Kumar Kartikeya Dwivedi --- .../selftests/bpf/prog_tests/test_tc_bpf.c | 169 ++++++++++++++++++ .../selftests/bpf/progs/test_tc_bpf_kern.c | 12 ++ 2 files changed, 181 insertions(+) create mode 100644 tools/testing/selftests/bpf/prog_tests/test_tc_bpf.c create mode 100644 tools/testing/selftests/bpf/progs/test_tc_bpf_kern.c diff --git a/tools/testing/selftests/bpf/prog_tests/test_tc_bpf.c b/tools/testing/selftests/bpf/prog_tests/test_tc_bpf.c new file mode 100644 index 000000000000..563a3944553c --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/test_tc_bpf.c @@ -0,0 +1,169 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define LO_IFINDEX 1 + +static int test_tc_internal(int fd, __u32 parent_id) +{ + DECLARE_LIBBPF_OPTS(bpf_tc_opts, opts, .handle = 1, .priority = 10, + .class_id = TC_H_MAKE(1UL << 16, 1)); + struct bpf_tc_attach_id id = {}; + struct bpf_tc_info info = {}; + int ret; + + ret = bpf_tc_attach(fd, LO_IFINDEX, parent_id, &opts, &id); + if (!ASSERT_EQ(ret, 0, "bpf_tc_attach")) + return ret; + + ret = bpf_tc_get_info(LO_IFINDEX, parent_id, &id, &info); + if (!ASSERT_EQ(ret, 0, "bpf_tc_get_info")) + goto end; + + if (!ASSERT_EQ(info.id.handle, id.handle, "handle mismatch") || + !ASSERT_EQ(info.id.priority, id.priority, "priority mismatch") || + !ASSERT_EQ(info.id.handle, 1, "handle incorrect") || + !ASSERT_EQ(info.chain_index, 0, "chain_index incorrect") || + !ASSERT_EQ(info.id.priority, 10, "priority incorrect") || + !ASSERT_EQ(info.class_id, TC_H_MAKE(1UL << 16, 1), + "class_id incorrect") || + !ASSERT_EQ(info.protocol, ETH_P_ALL, "protocol incorrect")) + goto end; + + opts.replace = true; + ret = bpf_tc_attach(fd, LO_IFINDEX, parent_id, &opts, &id); + if (!ASSERT_EQ(ret, 0, "bpf_tc_attach in replace mode")) + return ret; + + /* Demonstrate changing attributes */ + opts.class_id = TC_H_MAKE(1UL << 16, 2); + + ret = bpf_tc_attach(fd, LO_IFINDEX, parent_id, &opts, &id); + if (!ASSERT_EQ(ret, 0, "bpf_tc attach in replace mode")) + goto end; + + ret = bpf_tc_get_info(LO_IFINDEX, parent_id, &id, &info); + if (!ASSERT_EQ(ret, 0, "bpf_tc_get_info")) + goto end; + + if (!ASSERT_EQ(info.class_id, TC_H_MAKE(1UL << 16, 2), + "class_id incorrect after replace")) + goto end; + if (!ASSERT_EQ(info.bpf_flags & TCA_BPF_FLAG_ACT_DIRECT, 1, + "direct action mode not set")) + goto end; + +end: + ret = bpf_tc_detach(LO_IFINDEX, parent_id, &id); + ASSERT_EQ(ret, 0, "detach failed"); + return ret; +} + +int test_tc_info(int fd) +{ + DECLARE_LIBBPF_OPTS(bpf_tc_opts, opts, .handle = 1, .priority = 10, + .class_id = TC_H_MAKE(1UL << 16, 1)); + struct bpf_tc_attach_id id = {}, old; + struct bpf_tc_info info = {}; + int ret; + + ret = bpf_tc_attach(fd, LO_IFINDEX, BPF_TC_CLSACT_INGRESS, &opts, &id); + if (!ASSERT_EQ(ret, 0, "bpf_tc_attach")) + return ret; + old = id; + + ret = bpf_tc_get_info(LO_IFINDEX, BPF_TC_CLSACT_INGRESS, &id, &info); + if (!ASSERT_EQ(ret, 0, "bpf_tc_get_info")) + goto end_old; + + if (!ASSERT_EQ(info.id.handle, id.handle, "handle mismatch") || + !ASSERT_EQ(info.id.priority, id.priority, "priority mismatch") || + !ASSERT_EQ(info.id.handle, 1, "handle incorrect") || + !ASSERT_EQ(info.chain_index, 0, "chain_index incorrect") || + !ASSERT_EQ(info.id.priority, 10, "priority incorrect") || + !ASSERT_EQ(info.class_id, TC_H_MAKE(1UL << 16, 1), + "class_id incorrect") || + !ASSERT_EQ(info.protocol, ETH_P_ALL, "protocol incorrect")) + goto end_old; + + /* choose a priority */ + opts.priority = 0; + ret = bpf_tc_attach(fd, LO_IFINDEX, BPF_TC_CLSACT_INGRESS, &opts, &id); + if (!ASSERT_EQ(ret, 0, "bpf_tc_attach")) + goto end_old; + + ret = bpf_tc_get_info(LO_IFINDEX, BPF_TC_CLSACT_INGRESS, &id, &info); + if (!ASSERT_EQ(ret, 0, "bpf_tc_get_info")) + goto end; + + if (!ASSERT_NEQ(id.priority, old.priority, "filter priority mismatch")) + goto end; + if (!ASSERT_EQ(info.id.priority, id.priority, "priority mismatch")) + goto end; + +end: + ret = bpf_tc_detach(LO_IFINDEX, BPF_TC_CLSACT_INGRESS, &id); + ASSERT_EQ(ret, 0, "detach failed"); +end_old: + ret = bpf_tc_detach(LO_IFINDEX, BPF_TC_CLSACT_INGRESS, &old); + ASSERT_EQ(ret, 0, "detach failed"); + return ret; +} + +void test_test_tc_bpf(void) +{ + const char *file = "./test_tc_bpf_kern.o"; + struct bpf_program *clsp; + struct bpf_object *obj; + int cls_fd, ret; + + obj = bpf_object__open(file); + if (!ASSERT_OK_PTR(obj, "bpf_object__open")) + return; + + clsp = bpf_object__find_program_by_title(obj, "classifier"); + if (!ASSERT_OK_PTR(clsp, "bpf_object__find_program_by_title")) + goto end; + + ret = bpf_object__load(obj); + if (!ASSERT_EQ(ret, 0, "bpf_object__load")) + goto end; + + cls_fd = bpf_program__fd(clsp); + + system("tc qdisc del dev lo clsact"); + + ret = test_tc_internal(cls_fd, BPF_TC_CLSACT_INGRESS); + if (!ASSERT_EQ(ret, 0, "test_tc_internal INGRESS")) + goto end; + + if (!ASSERT_EQ(system("tc qdisc del dev lo clsact"), 0, + "clsact qdisc delete failed")) + goto end; + + ret = test_tc_info(cls_fd); + if (!ASSERT_EQ(ret, 0, "test_tc_info")) + goto end; + + if (!ASSERT_EQ(system("tc qdisc del dev lo clsact"), 0, + "clsact qdisc delete failed")) + goto end; + + ret = test_tc_internal(cls_fd, BPF_TC_CLSACT_EGRESS); + if (!ASSERT_EQ(ret, 0, "test_tc_internal EGRESS")) + goto end; + + ASSERT_EQ(system("tc qdisc del dev lo clsact"), 0, + "clsact qdisc delete failed"); + +end: + bpf_object__close(obj); +} diff --git a/tools/testing/selftests/bpf/progs/test_tc_bpf_kern.c b/tools/testing/selftests/bpf/progs/test_tc_bpf_kern.c new file mode 100644 index 000000000000..18a3a7ed924a --- /dev/null +++ b/tools/testing/selftests/bpf/progs/test_tc_bpf_kern.c @@ -0,0 +1,12 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include +#include + +/* Dummy prog to test TC-BPF API */ + +SEC("classifier") +int cls(struct __sk_buff *skb) +{ + return 0; +}